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Which of the fallowing halides is least stable and has doubtful existence

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${Cl}_{4}$

${Gel}_{4}$

${SnI}_{4}$

${Pbl}_{4}$

answer is D.

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Detailed Solution

${PbI}_{4}$ s least stable because of two reasons

(1) Size of iodine is biggest.

(2) $+ 2$ oxidation state of $Pb$ is more stable than $+ 4$

state because of inert pair effect.

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